Biology:Yinostius

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Short description: Extinct genus of fishes

Yinostius
Temporal range: Early Devonian: Emsian, 407.6–393.3 Ma
Life reconstruction of Yinostius major
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: †Placodermi
Order: †Arthrodira
Suborder: †Brachythoraci
Family: †Heterosteidae
Genus: †Yinostius
J. Wang & N. Wang, 1984
Species
  • Yinostius major J. Wang & N. Wang, 1984 (Type)
Synonyms
  • Yinosteus

Yinostius is an extinct genus of heterosteid placoderm of the Middle Devonian known from remains discovered in China .

Description

This genus is known from Emsian-aged specimens from the Wuding region of Yunnan, China.[1] In overall anatomy, it is extremely similar to the European genera, though it differs from them in its slightly smaller size, the shape of its nuchal plate, and in various body proportions.

Phylogeny

Yinostius is a member of the family Heterosteidae, which belongs to the superfamily Dunkleosteoidea. It is a relative of the giant Dunkleosteus, as shown in the cladogram below:[2]

Dunkleosteoidea
 

Eastmanosteus calliaspis

 
 
 
 

Eastmanosteus pustulosus

 
 

Kiangyousteus yohii

 
 
 
 

Golshanichthys asiatica

 
 
 

Westralichthys uwagedensis

 
 
 
 

Dunkleosteus raveri

 
 

Dunkleosteus terrelli

 
 
 
 

Dunkleosteus amblyodoratus

 
Heterostiidae
 

Heterosteus ingens

 
 

Yinostius major

 
 
 
 
 
 
 
 

References

  1. ↑ Wang Junqing & Wang Nianzhong (1984). "New Material of Arthrodira from the Wuding Region, Yunnan". Institute of Vertebrate Palaeontology and Palaeoanthropology, Academia Sinica, Beijing. http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/200903/W020090813374578814549.pdf. 
  2. ↑ Zhu, You-An; Zhu, Min; Wang, Jun-Qing (1 April 2016). "Redescription of Yinostius major (Arthrodira: Heterostiidae) from the Lower Devonian of China, and the interrelationships of Brachythoraci". Zoological Journal of the Linnean Society 176 (4): 806–834. doi:10.1111/zoj.12356. ISSN 0024-4082. 

Wikidata ☰ Q56275268 entry